Copyright©amberpasillas2010. Prime Numbers- A Prime number is a whole number with only 2 factors, one and itself. Composite Numbers- A Composite number.

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Presentation transcript:

copyright©amberpasillas2010

Prime Numbers- A Prime number is a whole number with only 2 factors, one and itself. Composite Numbers- A Composite number is a number that has more than two factors. Example: 2, 3, 5, 7, 11, 13, 17… Example: 4, 6, 8, 9, 10, 12, 14, 15…

copyright©amberpasillas2010 Composite Number - Composite numbers can be written as the product of prime numbers. This is called: Prime Factorization - Prime Factorization is the unique set of prime numbers whose product equals a given number.

Prime Factorization is when you write a number as the product of prime numbers.  Factor Tree Circle the prime numbers

copyright©amberpasillas2010 Write the prime factorization of the number Circle the prime numbers Notice you get the same answer doing it two different ways! No matter how your start, you will get the same answer! That is why prime factorization is so unique!

copyright©amberpasillas Notice we put them in order from least to greatest

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) 2) copyright©amberpasillas2010 Try these!

9ab 9 ab a b 3 3

copyright©amberpasillas m m 2 3

Factor - A whole number or variable expression that divides evenly into a given whole number or variable expression. List all the positive factors of the following Make a list! Why do you think I always start with one? copyright©amberpasillas2010

Making a list can be helpful to keep track of data and to spot any missing data. Making a list can be helpful to keep track of data and to spot any missing data. To find factors of a number make a list starting with the lowest possible factor which is 1. We start with 1 and work our way up. We know we didn’t miss any factors because our list is organized. copyright©amberpasillas2010

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1) Find all the factors 2) Write the prime factorization. 3) Tell whether the number is prime or composite. 1) 124 2) 1243) copyright©amberpasillas2010

1) Find all the factors. 2) Write the prime factorization. 3) Tell whether the number is prime or composite. copyright©amberpasillas2010 1) 97 2) 973)

Take Out Your Study Guide!!! copyright©amberpasillas2010

Prime Factorization is when you write a number as the product of prime numbers.  Factor Tree 36 # Circle the prime numbers

copyright©amberpasillas2010 #6 Make A List Making a list can be helpful to keep track of data and to spot any missing data. To make a list start with the lowest possible factor which is 1. Factors of 36 1 x 36 2 x 18 3 x 12 We know we didn’t miss any Factors because our list is ORGANIZED! Factors of 24 1 x 24 2 x 12 3 x 8 4 x 6 4 x 9 6 x 6